The Alpkit Tyndall Lantern is a mix of traditional lantern design with modern technology. Light output can be set from 10 to 400 lumens via a dimmer switch. A diffusion bulb pattern helps to spread light evenly with two lighting modes, one is bright white and one is warm ambient. The lantern is powered by a 5000 mAh Li-ion rechargeable battery. And it has a IPX5 waterproof rating.